They can be cleaned. It's not ideal, but very likely better than nothing. Sorry, can't find link, but they tried a variety of different techniques to hit on one that worked.
I own several cloth facemasks, but it is important to remember that reusing a washable can sometimes be worse than nothing, as it can trap and hold the virus and lead to greater exposure than no mask at all.
They can be cleaned. It's not ideal, but very likely better than nothing. Sorry, can't find link, but they tried a variety of different techniques to hit on one that worked.